The Dorset Ooser Marathon
& Half Marathon

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Now in its Fourth Year!

The Dorset Ooser Marathon & Half Marathon are fully signed challenging trail races in the heart of Dorset. 

We provide great support, first-aid cover, free car parking, an entry fee that wont break the bank, toilets, free refreshment at the finish, medals for all finishers, and 4 aid stations.


We wanted hills, we were sure you would demand mud, and we knew you'd love a route that will take you into  parts of deepest darkest Dorset, via old tracks, hidden holloways, ancient woodlands, and forgotten trails.

As previous runners of these races will testify, the route is constantly changing, and never boring.


We wanted UTMB® points.


​We wanted a weird name


We think we've nailed it with the Dorset Ooser -

If you haven't done it yet, take a chance and see what you think?


The Route

some of the best trails in dorset

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31km marathon / 12km half
31km marathon / 12km half
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The Races start from an ancient thatched barn in a historic tiny hamlet of Turners Puddle in the heart of Dorset.


The routes go straight uphill from the start, and then follow farm tracks, fields, trails that wind through ancient woodlands, old hidden holloways (sunken trails following historic drovers routes), short road sections through picturesque hamlets, managed woodland tracks, heathland, and all in the glorious Dorset countryside.

Despite all that lovely countryside though this race is not a pushover, as the previously earned 2 UTMB® points for the marathon will testify. In the marathon there are 13 hills, around 1000m of elevation, a fair bit of mud to lose your trail shoes in, 7 stiles to clamber over while swearing, & 2 fords.

There is also though some great runnable sections that you can pick up some speed on.


The Races are predominantly trail.

The Marathon has a maximum of 3km (approx) in total of short tarmac sections, the longest being 1km.

The Half Marathon has a maximum of 2.4km (approx) in total of short tarmac sections, the longest being 1.4km.


There is a generous 8 hour cut off time limit on the Marathon and a 4.5 hour cut off for the Half Marathon.


Routes will be marked with our own unique arrows. There will be marshalls at road crossings and critical junctions. As back up You will be provided with a gpx of the route with your race instructions.


There are 4 Aid station checkpoints on the marathon and 2 on the half marathon. All Aid stations will have shelter and will be stocked with basic provisions and currently all will have the same choice of items (TBC)


What does this mean? - it means that in line with most european trail races and now many UK trail races we will NOT be providing disposable cups at the aid stations, this is to cut down on both litter and waste. 
Aid station volunteers will be happy to fill your water bladders and bottles for you, but we recommend you obtain a re-usable cup for drinks at the aid stations.  Something like one of these is ideal:

£3.95 - super light re-usable FOLDING CUP

£7.50 - Hydra Cup 250ml- Xmiles


aid stations will be approx 7 - 8km apart at:

  • WEATHERBY CASTLE - 7km Marathon only

  • CLYFFE HOUSE - 16km Marathon only

  • AFFPUDDLE  - 24km Marathon / 8km Half

  • KITE HILL DAIRY - 32km Marathon / 16km Half


 Countdown to the Dorset Ooser 2 


Thanks! We'll get back to you asap.

More Details


    • Registration - registration time TBC

    • Race Start Times - Marathon 9:00am, Half 10:00am


  • Where? - Turners Puddle, Dorset. Postcode DT2 7JA, OR What3 Words code ///moved.pythons.swim will get you to the parking field by the farm, where you will also find portable toilets. Then it's a 10 min signed walk (uphill sorry!) to the Race start and finish area.

  • How Much? - Marathon Entry Fee is just £28 and Half Marathon Entry Fee just £17 for affiliated runners - just add £2 to these prices if you are not affiliated to a club.


  • Who? - These races will certainly appeal to those who love to race a tough off-road challenge, but equally, with the generous cut-off time, be accessible to those runners who prefer to enjoy the scenery on the way round. (You need to be a minimum of 18 on race day to enter the marathon and a min of 17 to enter the half)


  • How Long? - Cut offs are 8 hours for the Marathon and 4.5 hours for the half.


  • What's Included? - Medal for all finishers, fully signed and supported routes, route maps, event Medics, sweeper runners, Prizes for first 3 males and first 3 females, car parking, bag drop (not secured), post race refreshment, option to purchase event t-shirts. For completing the marathon 2 UTMB® points - (canicross runners are not eligible sorry).
    The Half Marathon is part of The Purbeck Trail Series

By entering you agree to our terms and conditionsThe Dorset Ooser is a CUPLESS event. Full race details, maps, timings, travel information, race rules and registration details will be sent to you after race entry.

Contact us above with any questions you may have.  

We are affiliated with XMILES Endurance Sports Store - for all your race nutrition needs